The more commonly used operators are listed here:

General

Equal

NotEqual

Less

LessEqual

Greater

GreaterEqual

Between

Containing

ContainingAll

ContainingSome

 

Full text operators

ExaleadAll

ExaleadSome

ExaleadExact

ExaleadNear

ExaleadButNot

ExaleadSoundsLike

ExaleadSpellsLike

ExaleadAdvanced

 

Date Operators

EqualDate

Before

After

Today

Yesterday

Tomorrow

 

The complete set of opcodes can be found here:

http://tech.teradp.com/tech/html/gn4/docs/VSdoc/frlrfTeraDPGN4CommonOpCodeClassTopic.html